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Specialty Roofing Products

OverFlow and FlowControl

The OverFlow® accessory is a spun aluminum round drain attachment. The product is designed to be used with all RetroDrains that are supplied with a clamping ring assembly. The purpose of the overflow drain assembly is to provide additional water drainage, if necessary, when water level on the roof exceeds 4" (10.16 cm) in height.

The FlowControl® is a spun aluminum round drain attachment with two specially designed weirs that provide a specific limited water flow rate under different water pressures (water head) on the roof. This product is designed and tested for application with all RetroDrains that are supplied with a clamping ring assembly. If the water level on the roof exceeds 4" (10.16 cm) in height, the FlowControl drain assembly will perform as an overflow drain.

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